Container



June 5, 1945. M. 1. WILLIAMSON cbnTAINEn Filed June 26, 1941 3 Sheets-Sheet l INVENTOR Mar hall Hifillhamson HIS A ORNEY June 5, 1945.

-M.. WILLIAMSON CONTAINER Filed June 26, 1941 s Sheets-Sheet 2 i .17- E2 INVENTOR ll l.WiHiamson June 5, 1945. M. I. WILLIAMSON CONTAINER 3 SheetsrSheet 3 Filed June 26, 1941 INVENTIOR Marjhall- I. Williamson S ATTORNEY Patented June 5, 1945 CONTAINER Marshalll. Williamson, New York, N. Y., assignor to National Folding Box Gompany,.New Haven, Conn, a corporation of New Jersey Application June 26, 1941', Serial No. 399,773

10 Claims.

This invention relates to containers having at least two parts telescopically related to each other and articulatively interconnected in such manner as to facilitate discharge ofcontents.

Within the scope of the invention, the two parts may be merely slidable relative to each other for enlarging 'the capacity of the container and for forming an opening for discharge of contents, or may be removable, one from the other, to an extent limited. only by the length of the articulative interconnecting means. In-. stances of removable telescopic covers. or caps which are held captive to'the container proper come within the latter. definition.

The invention is applicable to a variety of types of containers manufactured from various kinds of material, but. is especially significant in its application to folding boxes formed from out and scored blanks of sheet paper-board material by the use of standard automatic machinery.

A primary object of the invention is the provision of a container having at least two parts which telescope relative to each other to facilitate discharge of contents, and which are interconnected by articulative linkage in such manner that the articulative linkage will be concealed when the two parts are in mutual telescopic relationship.

Another object is as above, but with the provision that the articulative linkage will be entirely free and clear of. the zone of telescopic engagement of'the two parts, so as not to be interjected between normally contiguous. and slidably related surfaces during telescopic extension or retraction of the two parts relative to each 1 other.

Another object is as above, but with the provision that the articulative linkage material will not interfere with nor obstruct the normal containing space of the. container.

Anotherv object is as above,.but with the provision that the two parts of the container, after mutual separation of the parts from. their telescopic relationship, as. in the case of a so-called captive cap, may be guided into renewedtelescopic relationship relative to each other with a minimum of inconvenience and effort.

A further object is the accomplishment of any one or all of the above objects by a simple and effective construction capable of large scale production on existing. types of automatic machinery.

An outstanding feature of the invention, in the attainment: of the. foregoing objects; resides in the manner of se'curementof' the articulatlve linkage to that one container part which fits or telescopes over the other container part, and which is, therefore, termed'the outer container part. According to the invention such securement is made atthe inside of the closed end of said onecontainer part, i. e., the outer container part, such closed end being in most instances the top wall or panel of'the container- Another important feature resides in the nature of the articulative' linkage. According to the invention, the articulative portion is preferably'of panel formation having a plurality of mutually parallel transverse lines of fold extending therea'cross'. The lines of fold are preferably such as divide the articulative portion into several'substantially similar panel linkage sections which fold together bellows-wise when the two parts ofthe' container are telescopically retracted relative to each other.

Further objects and features of the invention will be. apparent from the following detailed description'of specific embodiments illustrated in the accompanying drawings. a

Inthedrawings:

Fig. 1 represents a perspective view, taken from the front, of a folding box representing one embodiment of the invention provided with a telescopically movable part having a pouring discha'rgeaperture therein;

Fig. 2, a view corresponding to that of Fig. 1, but illustrating the box in extended condition withv the pouring aperture completely opened for discharge of contents; hidden elements being revealedby dotted lines;

Fig. 3', a view similar to that of Fig. 2, but showing the box actually discharging contents through:- the pouring aperture;

Fig; 4, an enlarged: fragmentary view in vertical section takem on the line 4-4 of Fig. 1;

Fig. 5, a View corresponding to that of Fig, 4', but'taken onithejine 5.-5 ofJFig. 2;

Fig. 6, azview similar to. those of Figs; l and 5, but. taken onthe linetG-B of Fig. 1;

Fig. 7, a plan view of the inside face of the cutand scored blank used in forming the containing part, the: articulativelinkage, and portions for completing the telescopically movable part of the. folding box. illustrated in the foregoing figures;

Fig- 8, aview corresponding to that of Fig. 7, but illustrating. the blankused. in forming portions of the telescopically movable part of the folding box concerned;

Fig. 8a; a view corresponding to that of Fig, 8 but fragmentary in nature and illustrating a,

portion of a blank which is somewhat differently formed as respects the pouring aperture;

Fig. 9, a view corresponding to that of Fig. 1, but illustrating another embodiment of the invention of a type similar to that shown in Fig. 1;

Fig. 10, a view corresponding to that of Fig. 2, but illustrating the embodiment of Fig. 9;

Fig. 11, an enlarged fragmentary view in vertical section taken on the line II-I I of Fig. 9;

Fig. 12, an enlarged fragmentary view in vertical section taken on the line I2-I2 of Fig. 11;

Fig. 13, a plan view of the inside face of the cut and scored blank used to form the telescopically movable cover part of the embodiment of Fig. 9;

Fig. 14, a fragmentary view illustrating the important upper portion of the cut and scored blank used to form the containing part and articulative linkage of the embodiment of Figs. 9 and 10;

Fig. 15, a view corresponding to thoseof Figs. 1 and 9, but illustrating a still further embodiment of a type similar to those shown in Figs, 1 and 9;

Fig. 16, a view corresponding to that of Fig. 10,

Fig. 18, a plan view of the cut and scored blank used to form the telescopically movable cover part of the embodiment of Fig.

Fig. 19, a view corresponding to that of Fig. 18, but illustrating the blank used to form the containing part and the articulative linkage. of the same embodiment;

Fig. 20, a view corresponding to those of Figs. 1, 9 and 15, but illustrating another type of container pursuant to the invention in the form of a folding box having a removable, so-calld captive cap;

Fig. 21, a view similar to that of Fig. 20, but fragmentary in character and illustrating the removable cap or cover part in .open position;

Fig. 22, an enlarged fragmentary view in vertical section taken on the line 22-22 of Fig. 21;

Fig. 23, a view corresponding to that of Fig. 22, but illustrating the cover part in closed position;

Fig. 24, a view somewhat similar to that of Fig. 21, but illustrating the containing part and articulative linkage portion in front elevation, and the removable cap or cover in bottom plan;

Fig. 25, a plan view illustrating the inside face of the cut and scored blank used to formthe removable cap or cover part of the embodiment of Fig.

Fig. 26, a view corresponding to that of Fig. 25, but illustrating the blank used to form the containing part and the articulative linkage of the same embodiment;

Fig. 27, a view corresponding to that of Fig. 22, but illustrating a. different manner of securing the articulative linkage portion to the removable cap or cover part;

Fig. 28, a plan view of the cut and scored blank used to form the removable cap or cover part of the embodiment of Fig. 27;

Fig. 29, a plan view illustrating a fragment of the articulative linkage portion of the blank which is used to form the containing part as well as the articulative linkage portion of the embodiment of Fig. 27; and l Fig. 30, a view similar tothat of Fig. 27, but illustrating still another manner of attaching the articulative linkage portion to the removable cap or cover part.

Practical exemplification of the novel concepts of the invention are illustrated and described specifically with respect to various types of folding boxes formed of paper-board material. Utilization of the novel concepts in containers other than those falling within the category of folding boxes may be carried out by those skilled in the art from the structural characteristics and features here set forth.

.The type of folding box in which one part is a cover secured in telescopic relationship over the mouth of a containing part, or box proper, is illustrated in Figs. 1 through 8. The cover, or outer, part is connected to the box proper by articulative linkage which allows only limited telescopic sliding movement of the cover part relative to the box proper. The cover part here is not adapted for separation or removal from the box proper as it is in certain other embodiments of the invention.

The box proper I0 is formed from the cut and scored blank of Fig. 7, preferably by' the use of standard automatic machinery. The cover part I I is formed from the blank of Fig. 8 in cooperation with certain portions of the blank of Fig. 7.

The blank of Fig. 7 is novel only so far as the upper portion thereof is concerned. Its lower portion, adapted to form the bottom closure of the box proper, may be provided in a variety of conventional styles, the one illustrated being adapted to form a conventional glued type closure.

The blank of Fig. 7 comprises a front wall panel I2, a rear wall panel I3, side wall panels I4 and I5, respectively, and a conventional glue lap I6, all interconnected in edge-to-edge serial alignment and individually defined by suitable score lines, Bottom closure flaps I1 and I8 extend from the lower ends of the front and rear wall panels I2 and I3, respectively, and bottom closure supporting flaps I9 and 20 extend from the lower ends of' the side wall panels I4 and I5, respectively. The bottom closure flaps are adapted to be glued together in forming the conventional bottom closure indicated at H, Figs. 1, 2, and 3. Extending from the upper ends of the front and rear wall panels I2 and I3, respectively, are the respective articulative linkage portions indicated generally 22 and 23. The respective linkage portions 22 and 23 are, in this instance, identical in formation, and include respective sets of linkage sections comprising the linkage panels 22a, 22b, 22c, and 23a, 23b, and 230, respectively. In the present embodiment, the linkage panels 220. and 23a form the top closure of the box, and cooperate with the blank of Fig. 8 in forming the cover part I I. The respective sets of linkage sections 22b, 22c and 23b, 23c fold bellows-wise within the cover part I I, and provide for limited up and down telescopic sliding movement of the cover part II relative to the containing part, or box proper, Ill.

The blank of Fig. 8 comprises front and rear wall panels 24 and 25, respectively, side wall panel 26 and 21, respectively, and a conventional glue lap 28, all interconnected in edgewto-edge serial alignment, and individually defined by suitable score lines. Closure supporting flaps 29 and 30 extend from the upper ends of side wall panels 26 and 21, respectively, and friction-sealing flaps 3| and 32 extend from the lower ends thereof. Arcuate indentation 33 and 34. are preferably supplied substantially centrally-of the upper marginal: edges of the front and rear wall panels 24 and 25, respectively, for a purpose hereinafter explained. To. provide a pouring aperture for the discharge of contents from the 'box, an opening 35, conveniently of substantially diamond configuration, as illustrated, is formed in one of the side wall panels, here the panel 21.

The. blanks of Figs. 7 and 8 are folded on their respective score lines and glued, in conventional manner. The bottomclosure 2 I: may be closed and sealed either before or after the part formed by the blank of Fig. 8. is installed in place on the part formed by the blank of Fig. 7'. Ordinarily, however, it will be closed and sealed prior to the filling of the box, such filling being accomplished immediatelyprior to installing thepart formed by the. blank of Fig. 8 in place.

In forming the top closure 36 of the box, and in articulatively linking the cover part I I to the containing part, or box proper, III, the part formed by the blank of Fig. 8 is. slidover the upper portion of the part formed by the blank of Fig. 7, care being taken to see that. the friction-sealing flapsv 3I and 32 are folded upwardly against the inside face of the side wall panels 26 and 21, respectively,

' see Figs. 4, 5, and 6. The linkage portions 22 and 23.. as folded on. the several mutually parallel score lines between the respective panel sections 2212, 22c and 23b, 230, are pressed down to form the bellows 31 and 38-, respectively, see Fig. 4. The-closure supporting flaps 29 and 30, of the part formed by the blank of Fig. 8, are then folded downuponthe bellows 3'! and 38, as is illustrated in Fig. 4, and the top closure flaps 22a and 23a. folded down thereover and secured into place, preferably by gluing. In this manner, the closure supporting flaps 29 and 30 are inter-leaved between the two bellows 31 and 38 and the top closure flaps 22a and 23a. and the part formed by the blank of- Fig. 8 is thus locked to the part formed by. the blank of Fig. 7. The cover part I I is completely formed with articulative connection to the container part III through the bellows 31 and 38.

It can be seen that the articulative linkage provided by the bellows 31 and 38 is secured at the under-side of the top wall of the cover part II, and, when the cover part II is in completely telescoped position with respect to the containing part, or box proper, ID, that the articulative link.- age fits closely against the under-side of the said top wall, without in any way impeding the telescopic sliding movement of the two parts relative to each other, nor obstructing or reducing the containing capacity of the box.

The marginal indentations 33 and 34 of the cover, part, I I. facilitates the grasping of such cover part in extending the container to the position shown in Figs. 2, 3, and 5. In such extended position, the volume-of the container is enlarged so-,that additional space is provided for. facilitating initial movement of the contents toward the pouring aperture 35, see Fig. 3. After discharge of .a desired quantity of the contents of the box, the cover part II may be telescoped into closed position over the upper portion of the containing part, or box proper, I0, thus closing the pouring aperture 35. The friction-sealing flaps 3| and 32 provide effective seals against undesired sifting of contents from the box while closed and against the admission of vermin.

As illustrated in Fig. 8a, the blank of Fig. 8 mightbe provided with meansadapted to forma pouringaperture at some future time, rather than with, the actual, aperture 35. Such means may be a pull-out flap 39 having a suitable polygonal configuration, such as is illustrated, outlined in its. major part by deep perforations and in a minorrpart, a at, 39a, by a score line which becomes a hinge for the pull-out flap when the line of perforations is cut through for discharging the contents of the box. The vertical length of such flap 3.! is desirably such as to. extend below the top edge of the box proper when the same is in fully extended position so that. in reseatingthe flap to. reclose the pouring aperture, it will have a supporting surface to prevent its being pressed through the aperture. I

' In instances of packaging loose, fluffy, or-flaky substances in such a box, the box may be. assembled and set up. for filling with the two telescopically' related parts in extended relationship. After filling the thus setup box through the bottom, and after sealing the bottom closure, as pre. viously described, the filled box may be placed on a vibrating rack to settle the contents, whereafter, the telescopically related parts of the box may be compressed together to remedy what would otherwise constitue a. state ofjslack-pack- The embodiment illustrated in Figs. 9 through 14 is similar in many respects to that aforedescribed. The cover part 40 is connectedto the containing part, or box proper, M. by articulative linkage which allows only limited movement of such cover part relative to such box proper. In this embodiment, however, the cover part is separable and removable from the containing part, within limits determined by the length of the connecting linkage. Such connecting linkage serves to facilitate placement of the cover part over the mouth of the box proper byguiding it thereto. Because of the nature of the relationship between the cover part and the box proper, in extended or open position, apertures are formed between the two parts for the convenient discharge of contents from the box.

Thebox proper 41 is formed from the cutand scored blank of Fig. 14 in a manner similar to that, aforedescribed with respect to the box proper III. The lower portion of the blank of Fig. 14, indicated in the drawings as broken away, is identical with the lower portion ofthe blank of Fig. 7, and is adapted to form a glued? type bottom closure 42 which is identical with the aforedescribed bottom closure 4I. The blank otherwise comprises front and rear wall panels 43- and 44, respectively, side wallpanels 45 and. 46, respectively, and a conventional glue lap 4T, all interconnected in edge-to-edge serial alignment,

and individually defined by suitable score lines,

as is the case in the blank of Fig. 7. Extending from the upper ends of the front and rear wall panels 43 and 44, respectively, are respective articulative linkage portions indicated generally 41 and 48. These linkage portions are mutually identical in formation, and include respective sets of-linkage panel sections comprising the panel sections 41a, 41b, 41c and they panel sections 48a, 48b, 480, respectively, defined by mutually par allel score lines. The panel sections 412), 41c and the panel sections 48b, 48c fold bellows-wise within the cover part 40, while the panel sections 41a and 48a are respectively secured to the inside surface of the top wall of the cover part 40, as by gluing. Extending from the-upper ends of side wall panels 45 and 46, are friction-sealing flaps 49 and 50, respectively; These flaps correspond in functionto the, friction-sealing tabs 3|,

and the box proper.

32 of the blank of Fig. 8, as will be explained more fully hereinafter;

The cover part 48 is formed in entirety from the cut and scored blank of Fig. 13. Such blank comprises a substantially centrally located top wall panel 55, from the edges of which extend other wall panel sections, including the front wall forming panel sections 56 and 51, and the thereto oppositely extending rear wall forming panel sections 58 and 58. Such other wall panel sections also include the side wall forming panel sections 88 and BI, and the thereto oppositely extending side wall forming panel sections 62 and 63. For tying the several lateral walls together, interleaving corner flaps 64 and 55 extend from opposite ends of the panel section 58, and similar flaps 66 and 61 extend from opposite ends of panel section 56. Such inter-leaving corner flaps may be reduced in width by edge cuts, as at 68, to

compensate for the thickness of the sheet material,

The two parts of the box are formed independently of each other. The blank of Fig. 13 is folded and glued in conventional manner to form the cover part 40, while the blank of Fig. 14 is also folded and glued in conventional manner to form the box proper 4|. In the latter instance,

the friction-sealing flaps 48 and 58 are folded downwardly, as indicated in Fig. 10, and the linkage panel sections 41b, 41c and 48b, 480 of the respective linkage portions 41 and 48 are folded upon themselves to form the bellows 68 and I8, respectively, Fig. 10. The linkage sections 41a and 48a are folded as indicated in Fig. 12, and are secured, preferably by gluing, to the inside face z.

of the top wall panel 55 of the cover part 40.

The cover part 40 is now permanently secured to the box proper 4|, and may be telescoped into and from its closing position over the mouth of the box proper 4| as desired. When the cover part is removed from thebox proper, as illustrated in Fig. 10, openings, as at II, are formed at both sides of the box between the cover part Such openings form pouring apertures, corresponding to the pouring aperture 35 in the aforedescribed embodiment, for the convenient discharge of contents from the box. The friction-sealing flaps 49 and 59 bear out- Jill wardly against the inside surfaces of the side walls I of the cover part 40, and eifectively assist in sealing the box when the cover part is in closed position.

The embodiment illustrated in Figs. 15 through 19 possesses characteristics of both of the aforedescribed embodiments. The cover part I5 thereof is articulatively connected to the containing part, or box proper, I8, by means of linkage which limits the extent of telescopic sliding movement of the cover part relative to the box proper. The cover part is not entirely removable from the box proper, as in the case of the last described embodiment, but is onlypartially so. A pouring aperture, similar to the pouring'aperture II of the last described embodiment, is thus formed at panels II and I8, respectively, and an interconnecting linkage portion I8. Such linkage portion-comprises the common linkage panel section 18a, and the sets of bellows-forming linkage panel sections 19b, 18c and 18d, 'I8e, respectively, defined by mutually parallel score lines. Locking flaps 18f and 79g extend from opposite ends of the common linkage panel section 18a for a purpose explained hereinafter. The front wall panel II, the linkage portion I9, and the rear wall panel I8 are serially. aligned in that order. Side wall panels 88 and 8| extend laterally from opposite sides, respectively, of front wall panel 11, and similar side wall panels 82 and 83 extend laterally from opposite sides of rear wall panel I8. Friction-sealing flaps 84 and 85 extend from those ends of side wall panels 82 and 83, respectively, which are adjacent the linkage portion I9. Bottom closure flaps 88 and 81 extend oppositely from the ends of front and rear wall panels 11 and I8, respectively, and closure supporting flaps 88 and 88 extend from those ends of side wall panels 80 and 8|, respectively, which are adjacent the closure flap 86. The closure flaps 88 and 81 and closure supporting flaps 88 and 89 are, together, adapted to form the glued type bottom closure 89, Fig. 15. The various wall panels, linkage sections, tabs, and flaps are defined in the blank by suitable score lines, as indicated.

The blank of Fig. 18 comprises a top wall panel 92, and front and rear wall panels 83 and 84, respectively, having their outside edges cut on the bias, as illustrated. Extending from the ends of the top Wall panel 82 are the sets of side wall panel sections 95, 86 and 81, 98, respectively, of which the sections 86 and 88 are cut short and function as locking fiaps as hereinafter explained. Extending from opposite ends of the side wall panel 83 are inter-leaving corner flaps 88 and I80, respectively, and extending from opposite ends of the sidewall Panel 84 are inter-leaving corner flaps HH and I02, respectively, such flaps being cut, as indicated at I83, for accommodating the thickness of the sheet material when assembled.

As before stated, the blank of Fig. 18 forms the cover part 15, and the blank of Fig. 19 forms the containing part, or box proper, I8, as well as the articulative linkage I8. The two blanks are individually folded and glued to form the respective parts.

With respect to the box proper I6, it should be noted that the linkage extends continuously from the upper end of the front wall panel 11 to the upper end of the rear wall panel I8, and, in effect, forms a bridge over the mouth of the box proper, to which bridge the cover part is secured. It should be noted, also, with respect to this particular embodiment, that the blank, Fig. 19, of the box proper provides two sets of side wall panels 80, 8| and 82, 83 which, in forming the box, are glued in fully overlapping relationship, the panels 89, 8| overlying the panels 82, 83, thus forming double thick side walls of the box proper. The friction-sealing flaps 84, 85, extending from panels 82, 83, are folded downwardly over the upper edges of panels 80, 8|.

Securement of the cover part I5 to the box proper I6, is accomplished by cooperative association of the locking flaps 19} and 18g of the articulative linkage 18 with the short side wall panel sections, or locking flaps, 86 and 88, respectively, of the cover part. As may be seen in Fig. 17, the locking flaps 86 and 88, when folded inwardly and glued against the inside faces of their respectively associated inter-leaving corner flaps 99, MI and I00, I02. serve to engage the locking flaps 19f and 19g of the articulative linkage in edge-to-edge abutting relationship and thus to secure the cover part to the box proper, when the two parts are brought together.

The bias-cut outside edges of front and rear wall panels 93 and 94, respectively, give greater depth to one side of the cover part 15 than to the other, and, accordingly, when the cover part I5 is telescoped upwardly in an extending'move ment relative to the box proper I6, only one side thereof is removed from the box proper. Only one pouring aperture, see I04, Fig. 16, therefore, is provided between the cover part and the mouth of the box proper, the opposite side of the cover part remaining in engagement with the box proper.

As in the first described embodiment, it is desired that grasping of the cover part for the opening and closing telescopic movement thereof be facilitated. Accordingly, arcuately defined apertures I05 and I06 are provided in the blank of Fig. 18 at the junctions of the front wall panel 93 andthe topwall panel 92, and of the rear wall panel 94 and. the top wall panel 92, respectively.

The embodiments of the remaining figures of the drawings exemplify the inventive concept as applied to cover parts which are removable from the containing parts or boxes proper, but hinged thereto so that they may be swung back away from the open mouths of the containing parts, or boxes proper. The articulative linkage in each of these instances provides the hinge action, and enables the cover part to be swung back free and clear of the mouth of the containing part, orbox proper, within limits depending ,upon the length of the articulative linkage. The advantageous characteristics of the previously described embodiments are inherent in the embodiments presently considered.

The embodiment illustrated in Figs. 20 through 26 comprises a cover part, or so-called captive cap, I I0, and a containing part, or box proper, III.

The cover part H and. the box proper III are formed individually from respective suitably cut and scored blanks. The blank of Figs. 25 is used to form the cover part, while the blank of Fig. 26 is used to form the box proper.

The'blank of Fig. 26 comprises front and rear wall panels H2 and H3, respectively, side wall panels II 4 and H5, respectively, and a conventional lateral glue lap II6, all interconnected in edge-to-edge serial alignment and individually defined by suitable score lines. Bottom closure flaps II! and H8 extend from the lower ends of front and rear wall panels H2 and H3, and bottom closure supporting flaps H9 and I20 extend from the lower ends of side wall panels 4 and H5, respectively. An articulative linkage portion, indicated generally I2I, extends from the upper end of rear wall panel H3, and comprises the linkage panel sections I2Ia, I2lb,'and I2Ic. The upper edges of the side wall panels I I4 and I I may be cut away as indicated at I Ida and II5a, respectively and the'score line II3a., between the rear wall panel I I3 and the linkage panel |2Ic may be dropped correspondingly from its normal location, to accommodate the linkage material when the cover part is closed over the open mouth of the containing part of the ultimately formed box. I

The blank of Fig. 25 comprises front and rear wall panels I22 and I23, respectively, side wall panelsill'l'and, I25 respectively, and a. conventional lateral glue lap I26, all interconnected in edge-to-edge serial alignment and individually defined bySuitable score lines, as in the case of the blank of Fig. 26. Top closure flaps I21 and I28. extend from the upper ends of front and rear wall panels I22 and I23, respectively, and inter-leaving closure-supporting flaps I29 and I30 .extend from the upper ends of sidewall panels I24 and I25, respectively. Corresponding lateral edges of the respective closure-supporting flaps I29 and I30 are cut away, as at I29a and I30a, to accommodate the thickness of the sheet material of the articulative linkage when the two parts of the IbOX are assembled.

The two lblanks are individually folded and glued in conventional manner, the bottom closure flaps Ill and H8, and closure-supporting flaps H9 and I20, of the blank of Fig. 26, together forming the bottom closure I3I of the box proper, and the top closure flaps I 21 and I28, andjclosure supporting flaps I29 and I30, of the blank ofFig, 25, together forming the closed top of the'cover part IIO.

In the assembling operation, the cover part formed by the blank. of Fig. 25 is telescoped, in open condition, over the upper end of the box proper formed by the blankof Fig. 26, and the closure-supporting flaps I 29 and I30 are folded down against the bellows-like hinge member I32, Fig. 23, formed by suitably folding the lower linkage panel sections I2Ib and I2Ic. Thereupon, the upper linkage panel section I 2Ia is folded down, over the folded closure-supporting flaps I29 and I30, and, thereafter, the top closure flaps I28 and I2l are folded down and glued, preferably in that order, over the linkage panel section I2Ia. Thus, the upper linkage panel section I 2m of the articulative linkage I2I is inter-i-leaved between the v closure-supporting flaps I29 and I30 and the closure flaps I21 and I28 of the cover part I'I0, thereby securing such cover part to the box proper II I.

Upon removing the so-formed cover part IIO from the box proper III by an upward sliding movement, the bellows-like hinge member serves to prevent loss or misplacement of the cover part, and alsoenables the cover part to be swung away from the open mouth of the box proper, see particularly Figs. 21, 22, and 24.

. It. should be noted that the bellows-like hinge member I32 seats within and is accommodated 'by the indentures H40, and II5a, see Figs. 22

and 26 of the box proper, and, therefore, does not interfere with the proper seating of the cover part onthe box proper. So that the bellows-like hinge part I 32 will not ofier spring-like resistance to'the seating of the cover part into closed position, the line of fold between the linkage panel sections I2Ib and I2Ic is preferably weakened by perforation, see I33.

In the above described embodiment, it is possible to eliminate the closure flap I28 from the cover :blankof Fig. 25, and to utilize the upper linkage panel section I2 Ia. of the blank of Fig. 26 in place thereof. In this circumstance, the closure flap I21 would be glued directly to the upper linkage panel section I 2Ia. in forming the top closure of the cover part IIO.

In the embodiment illustrated in Figs. 2'7, 28, and 29, the manner of securement of the articulative linkage to'the cover part is different from that of the embodiment of Figs. 20 through 26. Pursuant to this embodiment, the cover part M0 is formed with double front and. rear walls, while the containing part, or box proper, MI is constructed as in the previous embodiment except for the articulative linkage portion, indicated generally I42, Fig, 29, which is provided with looking tabs, I42a, I43a', for cooperation with the inner walls of the cover part I40 in securing such cover part to' the containing part, or box proper.

The cover part I40 is formed from the blank of Fig, 28, while the box proper MI is formed from the blank of Fig. 29, such latter blank being similar to the' blank of Fig. 26 in every respect except for certain characteristics of the articulative linkage portion.

The blank of Fig. 28 is generally similar to the blank of Fig. 13, and comprises a substantially centrally located top wall panel I43, from the edges of which extend other wall panel sections, including the panel sections I44 and I45, which together form the front wall of the cover part, and the thereto oppositely extending panel sections I46 and I41, which together form the rear wall of the cover part. Such other wall panel sections also include the panel sections I48 and I 49, which together form one of the side walls of the cover part, and the thereto oppositely extending panel, sections I50 and II, which together form the other of the side walls of the cover part. The panel sections I49 and I5I are shorter than their respectively associated panel sections I48 and I50, for providing lock-engaging edges utilized in securing the cover part to the articulative linkage portion of the box. For tying the several thus formed walls together, interleaving corner flaps I52 and I53 extend from opposite ends of the front wall panel section I44 and similar flaps I54 and I55 extend from opposite ends of the rear wall panel section I46. Such flaps may be reduced in width by edge cuts, as at I 56, to compensate for the thickness of the sheet material in forming the side walls;

The blank of Fig. 28 is folded and glued to form the cover part I40, the panel sections I49 and I5I being first folded inwardly and glued against the inner faces of their respectively associated panel sections I 48 and I50 for providing the lock-engaging edges I51 and I58, Fig. 2'7. I

The articulative linkage portion of the blank of Fig. 29 comprises the upper linkagepanel section I42a, and the set of bellows-forming linkage panel sections M21) and I42c. Locking tabs M211 and HM, utilized in securing the upper panel section I42a to the cover part of the box, are formed by cut-lines suitably placed adjacent the normal score line which divides the upper P linkage panel section I 42a from the linkage panel section I42b.

In assembling the cover part I and the box proper I4I, the articulative linkage panel M211 is inserted into the open mouth of the cover part, and its longitudinal free edge is lodged over the lock-engaging ed e I58 of the inner wall panel I of the cover part. The linkage panel I42a is then pressed into face-to-face engagement with the inner side of the top wall panel I43 of the cover part, thus causing the locking tabs I42a', I42a to snap over the lock-engaging edge I51 of the inner wall panel I41 of the cover part to thereby lock the cover part I 40 securely to the linkage portion of the box.

In the embodiment of Fig. 30, the cover part I60 is single-walled and may be formed by a blank similar to that of Fig. 28, the wall panel sections I45, I41 and I49, I5I, however, being eliminated. Such cover part is secured to the con taining part, or box proper, I8I by means of'articulative linkage I52, whose upperlinkage panel section I62a is merely glued to the inner face of the top wall panel of the cover part I 60.

All of the described embodiments are rightangled, that is, have rectangular horizontal cross-sections. Such is the preferred and usual box construction. Application of the novel concepts here disclosed, however, are not limited to such constructions, for boxes pursuant to the invention may have a variety of polygonal horizontal cross-sections.

Whereas the invention is here illustrated and described with respect to certain specific embodiments thereof, it should be realized that many changes may be made in these several specific embodiments, and that many other specific embodiments may be constructed, by those skilled in the art, without departing from the spirit and generic concepts of the invention as here set forth and as defined in the following claims.

Iclaim:

1. A box formed of sheet material and comprising a containing part, a cover part, and articulative linkage interconnecting the said parts, said containing part having lateral panel walls defining a mouth, said articulative linkage comprising a linkage panel member secured to one of said lateral panel walls and comprising panel sections articulatively joined and adapted to fold upon one another substantially bellows-wise, said cover part being of box formation having lateral panel walls corresponding to the said lateral panel'walls of the containing part, and having, further, a closed end and an open end, and being adapted for telescopic movement over the mouthend of said containing part for closing the box, said articulative linkage being secured within and substantially at the closed end of said cover part, having length sufficient to allow removal of said cover part from said containing part, and being arranged to function as a hinge affordin swinging movement of said cover part away from the mouth of said containing part when said cover part is removed from said containing part.

2. A box as recited in claim 1 wherein the linkage panel member is articulatively secured to the containing part along a line which is within said containing part and below the level-of the mouth thereof, so that the cover part will fit snugly over said containing part when in closed position.

'3. A folding box formed of foldable sheet material and comprising a containing part, a cover part, and articulative linkage interconnecting the said parts, the said containing part and the said articulative linkage being formed from a single blank of foldable sheet material cut and scored to provide lateral panel walls defining an open mouth at one end of the containing part and a linkage panel member extending from one of said lateral panel walls at said open mouth, said linkage panel member being traversed across its width by spaced parallel score lines, providing panel sections articulatively joined and adapted to fold upon one another substantially bellows-wise, and said cover part being formed from a single blank of foldable sheet material cut and scored to provide lateral panel walls, corresponding to the said lateral panel walls of the containing part, and closure flaps and closure supporting flaps for closing one end of said cover part, the said cover part being arranged for telescopic movement 2, acacia over and from the said mouth-end of the containing part, andthe free-end panel section of said linkage panel member being interleaved between said closure supporting flaps and said closure flaps of the cover'part, thus securing the cover part to the containing part.

4. A folding box formed of foldable sheet material and comprising a containing part, a cover part, and articulative linkage interconnecting the saidparts, the said containing part and the said articulative linkage and portions of the cover part being formed from a single blank of foldable sheet material cut and scored to provide lateral anel walls defining an open mouth at one end of the containing part, a pair of linkage panel members extending, respectively, from opposite lateral panel walls at said open mouth, and a pair, of closure flaps extending,

respectively, from the ends of said linkage panel members, each of the linkage panel members of said pair of same being traversed across its' width by spaced parallel score lines, providing panel sections articulatively joined and adapted to fold upon one another substantially bellowswise, and the remaining portions of said cover part being formed from a single blank of foldable sheet material cut and scored to provide lateral panel walls corresponding to the said lateral panel walls of the containing part, and closure supporting flaps for cooperation with the said pair of closure flaps in the closing of one end of said cover part, the said closure supporting flaps being interleaved between the said linkage panel members and the said closure flaps for securing that portion of the cover part which is formed by the second-named single blank to the said containin part, the said cover part being arranged for telescopic movement over the mouth-end of the said containing part.

5. A folding box formed of foldable sheet material and comprising a containing part, a, cover part, and articulative linkage interconnecting the said parts, the said containing part and the said articulative linkage and portions of the cover part being formed from a single blank of foldable sheet material cut and scored to provide lateral panel walls defining an open mouth at one end of the containing part, a pair of linkage panel members extending, respectively, from opposite lateral panel walls at said open mouth, and a pair of closure flaps extending, respectively, from the ends of said linkage panel members, each of the linkage panel members of said pair of same being traversed across its width by spaced parallel score lines, providing panel sections articulatively joined and adapted to fold upon one another substantialy bellowswise, and the remaining portions of said cover part being formed from a single blank of foldable sheet material cut and scored to provide lateral panel walls corresponding to the said lateral panel walls ofthe containing part, friction-sealing flaps for those opposite lateral walls of said cover part which lie between said linkage panel members, and closure supporting flaps for cooperation with the said pair of closure flaps in the closing of one end of said cover part, the said closure supporting flaps being interleaved between the said linkage panel members and the said closure flaps for securing that portion of the cover part which is formed by the second-named single blank to the said containing part, the said cover part being arranged for telescopic movement over the mouth-end of the said containing part.

6. A box-formed of sheet material and comprising a containingpart, a-cover part, and articulative linkage interconnecting the said parts; said containing part having lateral panel Wall's defining a mouth, sa-id articulative linkage comprising a pair of linkage panel members respectively secured to two of those said lateral panel walls which are disposed opposite each other; and eachof said linkage panel members comprising panel sections articulatively joined and adapted to fold upon ne another substantially bellows-Wise, and said cover part being of box formation having lateral panel walls corresponding to the said lateral panel walls of the containing part, and having, further, a closed end and an open end, and being adapted for telescopic movement over the mouth-end of said containing part and sealing members carried by one of said box parts for effecting a relatively tight fit between the cover part and the containing part when the cover part is in place over the mouth of the containing part.

7. A box formed of sheet material and comprising a containing part, a cover part, and articulative linkage interconnecting the said parts, said containing part having lateral panel walls defining a mouth, said articulative linkage comprising a pair of linkage panel members respectively secured to two of those said lateral panel walls which are disposed opposite each other, and each of said linkage panel members comprising panel sections articulatively joined and adapted to fold upon one another substantially bellows-wise, and said cover part being of box formation having lateral panel walls corresponding to the said lateral panel walls of the containing part, and having, further, a closed end and an open end, and being adapted for telescopic movement above the mouth-end of said containing part, the articulative linkage having a length to afford extended telescopic movement of the cover part relative to the containing part to provide a clearance between the cover part and the containing part to afford a dispensing opening therebetween.

8. A box formed of sheet material and comprisin a containing part, a cover part, and articulative linkage interconnecting the said parts, said containing part having lateral panel walls defining a mouth, said articulative linkage comprising a pair of linkage panel members respectively secured to two of those said lateral panel walls which are disposed opposite each other, and each of said linkage panel members comprising panel sections articulatively joined and adapted to fold upon one another substantially bellows-wise, and said cover part being of box formation having lateral panel walls corresponding to the said lateral panel walls of the containin part, and having, further, a closed end and an open end, and being adapted for telescopic movement over the mouth-end of said containing part, said articulative linkage being of a length to afford only limited sliding move-' ment of the cover part partially above the mouth end of the containing part, one of the lateral walls of the cover part which is disposed be tween the pair of articulative linkage panel members being formed to provide with the mouth end of the containing part a pouring aperture which is located to be closed by the cover part when the cover part is in retracted telescopic position over the containing part and to be opened when the cover part is in extended telescopic position over. the containing part.

cover part comprising extensions of its wall 10 panels which are disposed interiorly of the cover part in mutually superposed relation at the inner face of the closed end of the cover part and an end panel section of the articulative linkage is secured interiorly of the cover part adjacent the closed end of the cover part by interleaving the end panel section between the mutually superposed extensions of the cover part.

MARSHALL I. WILLIAMSON. 

